diff --git a/src/Mod/Material/App/MaterialValue.h b/src/Mod/Material/App/MaterialValue.h
index 8f1559ed31..ceaaf2682f 100644
--- a/src/Mod/Material/App/MaterialValue.h
+++ b/src/Mod/Material/App/MaterialValue.h
@@ -58,7 +58,7 @@ public:
     };
     MaterialValue();
     MaterialValue(const MaterialValue& other);
-    MaterialValue(ValueType type);
+    explicit MaterialValue(ValueType type);
     virtual ~MaterialValue() = default;
 
     MaterialValue& operator=(const MaterialValue& other);
diff --git a/src/Mod/Material/App/Materials.cpp b/src/Mod/Material/App/Materials.cpp
index 2ea280d8c4..050b2147f6 100644
--- a/src/Mod/Material/App/Materials.cpp
+++ b/src/Mod/Material/App/Materials.cpp
@@ -457,11 +457,11 @@ Material::Material(const Material& other)
         _allUuids.push_back(*it);
     }
     for (auto it = other._physical.begin(); it != other._physical.end(); it++) {
-        MaterialProperty prop = it->second;
+        MaterialProperty prop(it->second);
         _physical[it->first] = std::make_shared<MaterialProperty>(prop);
     }
     for (auto it = other._appearance.begin(); it != other._appearance.end(); it++) {
-        MaterialProperty prop = it->second;
+        MaterialProperty prop(it->second);
         _appearance[it->first] = std::make_shared<MaterialProperty>(prop);
     }
 }
@@ -1330,12 +1330,12 @@ Material& Material::operator=(const Material& other)
     // Create copies of the properties rather than modify the originals
     _physical.clear();
     for (auto it = other._physical.begin(); it != other._physical.end(); it++) {
-        MaterialProperty prop = it->second;
+        MaterialProperty prop(it->second);
         _physical[it->first] = std::make_shared<MaterialProperty>(prop);
     }
     _appearance.clear();
     for (auto it = other._appearance.begin(); it != other._appearance.end(); it++) {
-        MaterialProperty prop = it->second;
+        MaterialProperty prop(it->second);
         _appearance[it->first] = std::make_shared<MaterialProperty>(prop);
     }
 
diff --git a/src/Mod/Material/App/Materials.h b/src/Mod/Material/App/Materials.h
index 6dc24622c6..0749c6684f 100644
--- a/src/Mod/Material/App/Materials.h
+++ b/src/Mod/Material/App/Materials.h
@@ -47,9 +47,9 @@ class MaterialsExport MaterialProperty: public ModelProperty
 
 public:
     MaterialProperty();
-    MaterialProperty(const ModelProperty& property);
     MaterialProperty(const MaterialProperty& property);
-    MaterialProperty(std::shared_ptr<MaterialProperty> property);
+    explicit MaterialProperty(const ModelProperty& property);
+    explicit MaterialProperty(std::shared_ptr<MaterialProperty> property);
     ~MaterialProperty() override = default;
 
     MaterialValue::ValueType getType() const
diff --git a/src/Mod/Material/Gui/ArrayModel.h b/src/Mod/Material/Gui/ArrayModel.h
index 739bd6524d..303e94c6f6 100644
--- a/src/Mod/Material/Gui/ArrayModel.h
+++ b/src/Mod/Material/Gui/ArrayModel.h
@@ -38,7 +38,7 @@ namespace MatGui
 class AbstractArrayModel: public QAbstractTableModel
 {
 public:
-    AbstractArrayModel(QObject* parent = nullptr);
+    explicit AbstractArrayModel(QObject* parent = nullptr);
     ~AbstractArrayModel() override = default;
 
     virtual bool newRow(const QModelIndex& index) const = 0;
@@ -47,9 +47,9 @@ public:
 class Array2DModel: public AbstractArrayModel
 {
 public:
-    Array2DModel(std::shared_ptr<Materials::MaterialProperty> property = nullptr,
-                 std::shared_ptr<Materials::Material2DArray> value = nullptr,
-                 QObject* parent = nullptr);
+    explicit Array2DModel(std::shared_ptr<Materials::MaterialProperty> property = nullptr,
+                          std::shared_ptr<Materials::Material2DArray> value = nullptr,
+                          QObject* parent = nullptr);
     ~Array2DModel() override = default;
 
     // Overridden virtual functions
@@ -77,9 +77,9 @@ private:
 class Array3DDepthModel: public AbstractArrayModel
 {
 public:
-    Array3DDepthModel(std::shared_ptr<Materials::MaterialProperty> property = nullptr,
-                      std::shared_ptr<Materials::Material3DArray> value = nullptr,
-                      QObject* parent = nullptr);
+    explicit Array3DDepthModel(std::shared_ptr<Materials::MaterialProperty> property = nullptr,
+                               std::shared_ptr<Materials::Material3DArray> value = nullptr,
+                               QObject* parent = nullptr);
     ~Array3DDepthModel() override = default;
 
     // Overridden virtual functions
@@ -111,9 +111,9 @@ private:
 class Array3DModel: public AbstractArrayModel
 {
 public:
-    Array3DModel(std::shared_ptr<Materials::MaterialProperty> property = nullptr,
-                 std::shared_ptr<Materials::Material3DArray> value = nullptr,
-                 QObject* parent = nullptr);
+    explicit Array3DModel(std::shared_ptr<Materials::MaterialProperty> property = nullptr,
+                          std::shared_ptr<Materials::Material3DArray> value = nullptr,
+                          QObject* parent = nullptr);
     ~Array3DModel() override = default;
 
     // Overridden virtual functions
diff --git a/src/Mod/Material/Gui/DlgSettingsMaterial.h b/src/Mod/Material/Gui/DlgSettingsMaterial.h
index 183bfd555f..4f62921794 100644
--- a/src/Mod/Material/Gui/DlgSettingsMaterial.h
+++ b/src/Mod/Material/Gui/DlgSettingsMaterial.h
@@ -35,7 +35,7 @@ class DlgSettingsMaterial: public Gui::Dialog::PreferencePage
     Q_OBJECT
 
 public:
-    DlgSettingsMaterial(QWidget* parent = nullptr);
+    explicit DlgSettingsMaterial(QWidget* parent = nullptr);
     ~DlgSettingsMaterial() override = default;
 
 protected:
diff --git a/src/Mod/Material/Gui/MaterialDelegate.h b/src/Mod/Material/Gui/MaterialDelegate.h
index a395fa8d9f..294c520fd3 100644
--- a/src/Mod/Material/Gui/MaterialDelegate.h
+++ b/src/Mod/Material/Gui/MaterialDelegate.h
@@ -40,7 +40,7 @@ class MaterialDelegate: public QStyledItemDelegate
 {
     Q_OBJECT
 public:
-    MaterialDelegate(QObject* parent = nullptr);
+    explicit MaterialDelegate(QObject* parent = nullptr);
     ~MaterialDelegate() override = default;
 
     QWidget* createEditor(QWidget* parent,
diff --git a/src/Mod/Material/Gui/MaterialSave.h b/src/Mod/Material/Gui/MaterialSave.h
index 620c21ba70..9e173104cc 100644
--- a/src/Mod/Material/Gui/MaterialSave.h
+++ b/src/Mod/Material/Gui/MaterialSave.h
@@ -42,7 +42,7 @@ class MaterialSave: public QDialog
     Q_OBJECT
 
 public:
-    MaterialSave(std::shared_ptr<Materials::Material> material, QWidget* parent = nullptr);
+    explicit MaterialSave(std::shared_ptr<Materials::Material> material, QWidget* parent = nullptr);
     ~MaterialSave() override;
 
     void setLibraries();
diff --git a/src/Mod/Material/Gui/MaterialsEditor.h b/src/Mod/Material/Gui/MaterialsEditor.h
index 33f03b221d..1addd48314 100644
--- a/src/Mod/Material/Gui/MaterialsEditor.h
+++ b/src/Mod/Material/Gui/MaterialsEditor.h
@@ -46,7 +46,7 @@ class MaterialsEditor: public QDialog
     Q_OBJECT
 
 public:
-    MaterialsEditor(QWidget* parent = nullptr);
+    explicit MaterialsEditor(QWidget* parent = nullptr);
     ~MaterialsEditor() override = default;
 
     void onName(const QString& text);
diff --git a/src/Mod/Material/Gui/ModelSelect.h b/src/Mod/Material/Gui/ModelSelect.h
index 758bdda304..c316cf5414 100644
--- a/src/Mod/Material/Gui/ModelSelect.h
+++ b/src/Mod/Material/Gui/ModelSelect.h
@@ -44,8 +44,8 @@ class ModelSelect: public QDialog
     Q_OBJECT
 
 public:
-    ModelSelect(QWidget* parent = nullptr,
-                Materials::ModelFilter filter = Materials::ModelFilter_None);
+    explicit ModelSelect(QWidget* parent = nullptr,
+                         Materials::ModelFilter filter = Materials::ModelFilter_None);
     ~ModelSelect() override;
 
     void onURL(bool checked);